Renesas R-Car GPIO

modulename: gpio-rcar.ko

configname: CONFIG_GPIO_RCAR

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>Renesas R-Car GPIO
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Say yes here to support GPIO on Renesas R-Car SoCs.

source code:
drivers/gpio/gpio-rcar.c